Automatically identifying and quantitatively detecting method for high alkalinity sintered ore main minerals

Abstract

The automatic main mineral identifying and quantitatively detecting method for high alkalinity sintered ore belongs to the field of metallurgical technology. The method includes four parts of preparing sintered ore sample, X ray diffraction condition for quantitative analysis, standard diffraction curve database of high alkalinity sintered ore minerals, and sectional optimizing fitting and computer software. The method of the present invention makes it possible to identify the minerals in high alkalinity sintered ore and measure the content fast automatically. In addition, the present invention has less sampling error and no visual error.

Description

Technical field:

[0001] The invention belongs to the field of iron ore sintering in metallurgy, and is mainly suitable for quantitative analysis of main mineral composition in high-alkalinity sintered ore. technical background:

[0002] The mineral composition in sinter, especially the content of binder phase directly affects the strength and metallurgical properties of sinter. Therefore, quantitative analysis of mineral composition in sinter is very necessary to improve sinter ore blending scheme and optimize sintering conditions. However, such quantitative analysis has not yet been introduced into routine production.

[0003] In the past, the quantitative analysis of minerals in sinter mainly used the microscopic mineral phase method to estimate the percentage of calcium ferrite minerals in the total area under the microscope. The inhomogeneity of the atmosphere and temperature in the material layer during the sintering process leads to the inhomogeneity of the minerals ...

Examples

example 1

[0015] Example 1: The prepared hematite, magnetite and quaternary calcium ferrite (Ca 5 Si 2 Fe 16 al 2 o 36 , simplified into cf(4)) minerals, ground to a particle size of less than 0.050mm, adding 10% TiO 2 As a reference substance, the different proportions are shown in Table 1 and mixed thoroughly. Then, X-ray diffraction was performed on the mixed sample in the range of 15-65° at a scanning speed of 2° / min on an M21X X-ray diffractometer. Open the X-ray diffraction quantitative analysis software, then select qualitative analysis, give the possible mineral types and corresponding error indexes, and the minerals corresponding to each diffraction peak, finally, determine the type of reference material, perform quantitative calculation and give The calculated results show that the absolute error is within ±1.80%.

[0016] Table 1

[0017]

example 2

[0019] The high-alkalinity sintered ore of Baosteel in May 2005 was used for quantitative analysis by X-ray diffraction. Its chemical composition is shown in Table 2. Through peak comparison and diffraction analysis, it can be seen that the minerals in the sintered ore include hematite and magnetite. ore and calcium ferrite. Using this method to carry out mineral quantitative analysis results, the three contents are 54.91%, 19.24% and 25.83% respectively.

[0020] Table 2

[0021]

[0022] The mineral detection of each of the above samples, from the beginning of the diffraction experiment on the X-ray diffractometer to the qualitative and quantitative process on the computer, was completed within 30 minutes.

Technical field:

[0001] The invention belongs to the field of iron ore sintering in metallurgy, and is mainly suitable for quantitative analysis of main mineral composition in high-alkalinity sintered ore. technical background:

[0002] The mineral composition in sinter, especially the content of binder phase directly affects the strength and metallurgical properties of sinter. Therefore, quantitative analysis of mineral composition in sinter is very necessary to improve sinter ore blending scheme and optimize sintering conditions. However, such quantitative analysis has not yet been introduced into routine production.

[0003] In the past, the quantitative analysis of minerals in sinter mainly used the microscopic mineral phase method to estimate the percentage of calcium ferrite minerals in the total area under the microscope. The inhomogeneity of the atmosphere and temperature in the material layer during the sintering process leads to the inhomogeneity of the minerals ...

Examples

example 1

[0015] Example 1: The prepared hematite, magnetite and quaternary calcium ferrite (Ca 5 Si 2 Fe 16 al 2 o 36 , simplified into cf(4)) minerals, ground to a particle size of less than 0.050mm, adding 10% TiO 2 As a reference substance, the different proportions are shown in Table 1 and mixed thoroughly. Then, X-ray diffraction was performed on the mixed sample in the range of 15-65° at a scanning speed of 2° / min on an M21X X-ray diffractometer. Open the X-ray diffraction quantitative analysis software, then select qualitative analysis, give the possible mineral types and corresponding error indexes, and the minerals corresponding to each diffraction peak, finally, determine the type of reference material, perform quantitative calculation and give The calculated results show that the absolute error is within ±1.80%.

[0016] Table 1

[0017]

example 2

[0019] The high-alkalinity sintered ore of Baosteel in May 2005 was used for quantitative analysis by X-ray diffraction. Its chemical composition is shown in Table 2. Through peak comparison and diffraction analysis, it can be seen that the minerals in the sintered ore include hematite and magnetite. ore and calcium ferrite. Using this method to carry out mineral quantitative analysis results, the three contents are 54.91%, 19.24% and 25.83% respectively.

[0020] Table 2

[0021]

[0022] The mineral detection of each of the above samples, from the beginning of the diffraction experiment on the X-ray diffractometer to the qualitative and quantitative process on the computer, was completed within 30 minutes.

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